CN118042643A

CN118042643A - Information reporting method and user equipment

Info

Publication number: CN118042643A
Application number: CN202211359363.5A
Authority: CN
Inventors: 常宁娟; 刘仁茂
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2024-05-14
Also published as: WO2024094056A1

Abstract

The disclosure provides an information reporting method and user equipment. The information reporting method comprises the following steps: after a User Equipment (UE) in double connection successfully completes a primary and secondary cell PSCell changing process, the UE judges whether the PSCell changing process is failed along with a primary cell PCell switching process; when it is determined that the PSCell change procedure is accompanied by failure of the primary cell PCell handover, the UE includes information indicating the PCell handover failure in the SPR.

Description

Information reporting method and user equipment

Technical Field

The present disclosure relates to the field of wireless communication technologies, and more particularly, to an information reporting method of primary and secondary cell related information under a dual connection condition and a corresponding user equipment.

Background

A new study of Release 18 technical standards was approved at the third generation partnership project (3rd Generation Partnership Project:3GPP) ran#94e meeting (see non-patent document ：RP-213553：New WID on further enhancement of data collection for SON(Self-Organising Networks)/MDT(Minimization of Drive Tests)in NR and EN-DC). for the study of further enhancements to the network data collection process in Release 17 based NR systems for better purposes of self-organizing self-optimizing networks and minimizing drive tests one of the specific techniques of the study is to implement information reporting in the case of successful primary and secondary cell (Primary Secondary cell group Cell, PSCell) changes.

The present disclosure proposes a solution to the information reporting problem of how to implement PSCell in NR systems.

Disclosure of Invention

An object of embodiments of the present disclosure is to propose a solution to the problem of how to implement PSCell information reporting in NR systems. More specifically, the present disclosure proposes a solution to the PSCell change information recording problem after successfully performing a PSCell change procedure when a UE configures a dual connection (Dual Connectivity, DC) in an NR system. The embodiment of the disclosure provides an information reporting method executed in user equipment and corresponding user equipment.

According to a first aspect of the present disclosure, there is provided an information reporting method, including: after a User Equipment (UE) in double connection successfully completes a primary and secondary cell PSCell changing process, the UE judges whether primary cell PCell switching accompanied by the PSCell changing process fails or not; when it is determined that the primary cell PCell handover associated with the PSCell change procedure fails, the SPR includes at least one of the following information: first information for indicating that a PSCell change event is simultaneously performed with a PCell handover; second information for indicating that a failure has occurred in a PCell handover simultaneously performed by a PSCell change event; and third information for indicating a PCell handover corresponding to the source PCell information or the target PCell information, which is simultaneously performed by the PSCell change event.

In the information reporting method according to the first aspect, the UE preferably performs an SPR determination procedure when the PSCell change is successful, and the SPR includes SPR information.

In the information reporting method of the first aspect, it is preferable that the successful completion of the PSCell change is successful completion of a random access procedure to the PSCell triggered by the PSCell change.

In the information reporting method of the first aspect described above, preferably, the UE performs the SPR determination procedure when a timer T304 for the MCG expires, and the SPR information is included in the SPR.

In the information reporting method of the first aspect, preferably, when the RRC message for triggering PSCell change includes both synchronous reconfiguration for SCG and synchronous reconfiguration for MCG, the UE determines that the PSCell change procedure is accompanied by the PCell handover.

In the information reporting method of the first aspect, preferably, the PCell information includes a cell identifier corresponding to the PCell or a measurement result of the PCell.

In the information reporting method of the first aspect, preferably, the SPR configuration from the network side is received before the UE performs PSCell change, the SPR configuration includes a configuration parameter for triggering SPR, and the SPR determination process is performed based on the SPR configuration.

In the information reporting method of the first aspect, the configuration information preferably indicates whether the UE generates the SPR when the PSCell change is successfully completed and the PCell handover performed simultaneously fails.

In the information reporting method of the first aspect, preferably, in a case that the UE receives UEInformationRequest a message from a network side, and the UEInformationRequest message carries an instruction/request for requesting the UE to report the stored SPR, the UE includes the stored content in the SPR in a UEInformationResponse message, and sends the UEInformationResponse message to the network side.

According to a second aspect of the present disclosure, there is provided a user equipment, UE, comprising: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, perform the information reporting method according to the context.

The beneficial effects of the invention are that

According to the information reporting method executed by the user equipment and the user equipment, the network side can acquire the cell change condition of PCell switching under the PScell change scene, so that the adjustment and optimization of mobility parameters are realized.

Drawings

For a more complete understanding of the present disclosure and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic flowchart showing an information reporting method in embodiment 1 of the present disclosure.

Fig. 2 is a schematic flowchart showing an information reporting method in embodiment 2 of the present disclosure.

Fig. 3 is a schematic flowchart showing an information reporting method in embodiment 3 of the present disclosure.

Fig. 4 is a schematic flowchart showing an information reporting method in embodiment 4 of the present disclosure.

Fig. 5 is a schematic flowchart showing an information reporting method in embodiment 5 of the present disclosure.

Fig. 6 is a schematic flowchart showing an information reporting method in embodiment 6 of the present disclosure.

Fig. 7 is a block diagram showing a user equipment UE to which the present disclosure relates.

In the drawings, the same or similar structures are identified by the same or similar reference numerals.

Detailed Description

Other aspects, advantages, and salient features of the present disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the present disclosure.

In the present disclosure, the terms "include" and "comprise," along with their derivatives, are intended to be inclusive, rather than limiting; the term "or" is inclusive, meaning and/or.

In this specification, the various embodiments described below for the purpose of describing the principles of the present disclosure are illustrative only and should not be construed in any way as limiting the scope of the disclosure. The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the present disclosure defined by the claims and their equivalents. The following description includes numerous specific details to aid in understanding, but these details should be construed as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness. Furthermore, the same reference numerals are used for similar functions and operations throughout the drawings.

Various embodiments in accordance with the present disclosure are described in detail below with a long term evolution system (Long Term Evolution, LTE)/NR mobile communication system and its subsequent evolutions as an example application environment. It should be noted that the present disclosure is not limited to the following embodiments, but is applicable to still other wireless communication systems. Unless specifically stated otherwise, in the present disclosure, concepts of a cell, a base station, and a cell group may be replaced with each other; the LTE system is also used to refer to the 5G and later LTE systems (e.g., referred to as eLTE system, or LTE system that may be connected to the 5G core network), while LTE may be replaced with evolved universal terrestrial radio access (Evolved Universal Terrestrial Radio Access, E-UTRA) or evolved universal terrestrial radio access network E-UTRAN. The present disclosure relates to primary cell PCell changes and primary secondary cell PSCell changes. Wherein the primary cell PCell change is also referred to as handover. Source master base station, source master beam (beam), source master transmission point (Transmission point, TRP), source master cell (PRIMARY CELL, PCELL), source master cell Group (MASTER CELL Group, MCG) are replaceable; the target master base station, the target master beam, the target master transmission point, the target master cell PCell and the target master cell group MCG can be replaced. Also, source PSCell, source secondary base station, source secondary cell group (Secondary Cell Group, SCG), source secondary beam (beam), source secondary transmission point (Transmission point, TRP) can be replaced; the target PSCell, the target secondary base station, the target secondary beam, the target secondary transmission point, and the target secondary cell group SCG can be replaced. In the present disclosure, a handover command is used to trigger a UE to perform handover, and a PSCell change command is used to trigger the UE to perform PSCell change. In the NR system is an RRC reconfiguration message containing a synchronization reconfiguration (Reconfigurationwithsync) information element, in particular, the handover command is an RRC reconfiguration message containing a synchronization reconfiguration (Reconfigurationwithsync) information element for MCG; the PSCell change command is an RRC reconfiguration message containing a synchronization reconfiguration (Reconfigurationwithsync) information element for SCG. At this time, the handover may also be referred to as a synchronous reconfiguration of the MCG or a synchronous reconfiguration of the PCell; the PSCell change may also be referred to as a synchronous reconfiguration of SCG or a synchronous reconfiguration of PSCell. The synchronization reconfiguration information element may include configuration information of the target cell, for example, target cell identification, target cell frequency, common configuration of the target cell such as system information, random access configuration used by the UE to access the target cell, security parameter configuration of the UE in the target cell, radio bearer configuration of the UE in the target cell, and the like. Cancel, release, delete, empty, clear, etc. may be replaced. Execution, use, and application alternatives. Configuration and reconfiguration may be replaced. Monitoring (monitor) and detection (detect) may be substituted. For ease of description, PCell change and PSCell change are also collectively referred to as cell change.

The following describes processes or concepts in the prior art to which the present disclosure relates.

Cell change configuration in NR system:

In NR systems, the RRC reconfiguration message for the cell change command carries the RRC configuration from the target base station, including but not limited to the following RRC configuration (see section 6.2.2 in 3GPP technical standard protocol 38.331 for details):

-measurement configuration: for configuring intra-frequency, inter-frequency and inter-radio access technology measurements performed by the UE. Such as measurement object configuration, measurement report configuration, measurement gap (gap) configuration, etc.

-Cell group configuration (cellGroupConfig information elements) for configuring secondary cell groups. Including radio link control (Radio Link Control, RLC) bearer configuration (RLC-bearerToAddModList information element and RLC-bearerToreleaselist information element) corresponding to data radio bearers/signaling radio bearers, medium access control (Medium Access Control, MAC) configuration (MAC-cellgroupconfig information element), physical layer configuration, secondary cell addition/modification/release configuration, special cell (SPECIAL CELL, spCell) configuration, and the like. The SpCell configuration includes a cell index number, cell change information (reconfigurationWithSync information element), a radio link failure related timer and constant configuration, radio link detection (Radio Link Monitoring, RLM) configuration, special cell dedicated configuration, and the like. The reconfigurationwithsync information element contains Cell change related information such as serving Cell configuration public information, cell radio network temporary identifier (Cell-Radio Network Temprory Identifier, C-RNTI) of the UE in the target Cell, cell change procedure monitoring timer T304 configuration, random access dedicated configuration for random access procedure to the target Cell, and the like.

-A radio bearer configuration (radiobearerConfig information element) for configuring a service data application protocol layer (SERVICE DATA Application Protocol, SDAP) and a packet data convergence protocol layer (PACKET DATA Convergence Protocol, PDCP) of the data radio bearer (Data Radio Bearer, DRB) and/or the signaling radio bearer (SIGNALING RADIO BEARER, SRB).

-Key update configuration.

Double connection (Dual Connectivity):

In order to improve the data transmission efficiency of the UE, the UE establishes links with two base stations at the same time, i.e. the radio resources used by the UE are provided by different schedulers located at the two base stations. The radio access between the two base stations and the UE may be of the same or different formats (Radio Access Technology, RAT), such as both NR, or one NR and one LTE also known as evolved universal terrestrial radio access (Evolved Universal Terrestrial Radio Access, E-UTRA). Of these two base stations, one is called Master Node (MN) or MgNB, meNB, and the serving cell Group under the Master base station is called Master cell Group (MASTER CELL Group, MCG); the other is called Secondary Node (SN) or SgNB, seNB, and the group of serving cells under the Secondary base station is called Secondary cell group (Secondary Cell Group, SCG). When the primary base station is LTE and the secondary base station is NR, DC is referred to as EN-DC (using a 4G core network) or NGEN-DC (using a 5G core network); DC when both the primary and secondary base stations are NR is referred to as NR-DC. The MCG includes a primary Cell (PRIMARY CELL, PCELL) and optionally one or more Secondary cells (scells). The PCell operates on a primary frequency, and the UE performs an initial connection establishment procedure or a connection re-establishment procedure through the primary frequency. The SCG comprises one primary SCG cell (PRIMARY SCG CELL, PSCELL) and optionally one or more scells. PSCell refers to an SCG cell in which a UE performs random access when performing a synchronization reconfiguration procedure of an SCG. PCell and PSCell are also collectively referred to as a special cell SpCell. When DC is configured, DRBs and SRBs supporting the UE are configured as split bearers (split bearers). When not configured as split SRBs, SRB1 and SRB2 are transported over the MCG path. In addition, when the DC is configured, SRB3 may also be established for SN for transmitting configuration associated with SCG between SN and UE, etc. Both the establishment and release of SRB3 are determined by SN.

Handover in NR system:

The user mobility for the PCell in the connected state is mainly achieved through a handover procedure. The handover refers to a procedure in which the UE in the RRC connected state changes the PCell. The general handover procedure comprises the following phases: stage 1: and (3) a measuring stage. And the UE measures the wireless links corresponding to the serving cell or the adjacent cells based on the configured measurement parameters, and when the configured measurement reporting condition is met, the UE sends a measurement report to the base station. Stage 2: and a switching preparation stage. The base station determines to trigger the handover for the UE in combination with the received measurement report and other factors such as the load of the base station, and the source base station and the target base station acquire the handover command configured by the target base station through the handover preparation process. Stage 3: and switching an execution stage. The source base station issues a switching command to the UE, and the UE receiving the switching command immediately applies the configuration of the switching command to execute switching. The UE detects a switching process through a timer T304, and when the switching process is initiated, the UE starts the T304 timer; when the handover procedure is completed, the UE stops the timer T304; when T304 times out, the UE considers the handover failed.

The NR system of release 16 and beyond also supports condition-based handover (Conditional Handover, CHO). In the condition switching, the base station can issue the switching command containing one or more switching candidate cells and the corresponding switching execution conditions to the UE in advance before the real switching conditions are met. After receiving the conditional handover command, the UE does not immediately execute handover, but saves the received handover command configuration, and starts to monitor the link quality of the source cell or the link quality of the target cell according to the handover execution condition carried in the handover command message, so as to evaluate whether the handover execution condition is satisfied. Only when the configured handover execution condition is detected to be satisfied, the UE starts to execute the stored handover command and accesses the corresponding target cell. The conditional switch is also referred to as a conditional reconfiguration (conditional reconfiguration).

PSCell change procedure in NR system:

The change of PSCell may be initiated by MN or SN. The MN or SN may initiate a change of the PSCell based on a measurement result of the source PSCell or a neighboring cell reported by the UE or a load of the neighboring cell. During a PSCell change with MN participation (whether MN initiated or SN initiated), a cell change command for PSCell is contained in an RRC reconfiguration message for SRB1 to the UE. The PSCell change command is an RRC reconfiguration message for SCG. When sent to the UE over the MCG link, is typically contained in mrdc-SecondaryCellGroupConfig information element or hr-SecondaryCellGroupConfig information element and nested in the RRC reconfiguration message of SRB 1. If the PSCell is changed without the participation of MN, such as intra-SN PSCell changing scene, SN may autonomously generate RRC reconfiguration message of PSCell changing command and send the RRC reconfiguration message to UE through SRB3 of SCG link.

When the UE receiving the PSCell change command triggers the change to the target PSCell, the UE applies the configuration in the command to execute the PSCell change, including executing the random access process to the target PSCell. The UE detects a cell change process through a timer T304, and when the cell change process is initiated, the UE starts the T304 timer; when the cell change procedure is completed (the random access procedure is successfully completed), the UE stops the timer T304; when T304 times out, the UE considers the PSCell change failure or the synchronization reconfiguration failure.

Likewise, the NR system of release 16 and later also supports a condition-based PSCell Change, that is, a condition reconfiguration for PSCell, called a condition PSCell Change (Conditional PSCELL CHANGE, CPC) or a condition PSCell addition and Change (Conditional PSCell Addition/Change, CPAC).

Reporting radio link failure:

In the NR system, the UE generates and stores a radio link Failure Report (RLF Report) when a radio link Failure (Radio Link Failure, RLF) or a Handover Failure (HOF) occurs, and stores radio link Failure information in the UE variable VarRLF-Report. In general, the UE only saves the RLF Report of the last connection failure (RLF or HOF), that is, when the connection failure occurs, the UE clears the RLF Report saved last time, and then saves the failure information corresponding to the last connection failure in variables VarRLF-Report. After restoring the connection with the network side (e.g., through an RRC reestablishment procedure or an RRC establishment procedure for establishing a new connection), the UE may inform the network side of the available radio link failure reports thereon through an RRC message (as indicated by rlf-InfoAvailable information elements). After receiving the indication, the network side may request the UE to report its saved radio link failure report through an RRC message (e.g., rlf-ReportReq information element in the UE information request UEInformationRequest message indicates the request). The UE will Report the saved radio link failure Report (rlf-Report information element in the UE info response UEInformationResponse message) to the network side in a response RRC message. The radio link failure report acquired by the network side is used for network optimization, such as network coverage and mobile robustness optimization. The radio link failure report includes information related to link failure, including measurement results of a source cell, a target cell or a neighbor cell when the link failure occurs, location information, a primary cell identifier of the occurrence of the link failure, a link failure type (RLF or HOF), an RLF reason, an elapsed time from the connection failure to reporting of the RLF report (denoted as timeSinceFailure information element), an elapsed time from the last reception of a handover command (handover initiation or handover execution) to the connection failure (denoted as timeConnFailure information element), a time between the connection failure and the next UE entering the RRC connection state after the failure of the reestablishment procedure (denoted as timeUntilReconnection information element), an RRC reestablishment cell identifier, and the like. RLF and HOF are collectively referred to as connection failure.

Successful handover report:

a handover information report at the time of successful handover, i.e., a successful handover report (Successful Handover Report, SHR) is introduced in the NR system of release 17. This is because performing network optimization in NR systems solely by radio link failure RLF reporting in existing mechanisms may make the data collection procedure lengthy, whereas handover information reporting allows the network side to obtain a sufficient number of samples in the mobility procedure faster when the handover is successful. Second, even for successful handover scenarios, there is room for further optimization of its mobility parameters. For SHR content, one or more of the following may be included: a source cell identifier of the handover; a target cell identifier of the handover; measurement results of the source cell or the target cell switched; neighbor cell measurement results; indicates why the SHR was triggered (i.e., which trigger condition was met), etc. The handover success may be an RRC reconfiguration complete message for responding to a handover command RRC reconfiguration message to the target base station or the MAC layer successfully completes a random access procedure to the target base station. The network side needs to configure trigger condition related parameters (such as threshold values corresponding to T310, T312 and T304) of a successful handover report to the UE, and the UE records the handover information of the successful handover only when one or more configured trigger conditions are met (such as the running value of T310 or T312 of the source cell exceeds the configured corresponding threshold value when a handover command is received, and the running value of T304 when the handover is completed successfully exceeds the configured corresponding threshold value). The trigger condition related to the source cell, such as a T310 threshold or a T312 threshold, is configured by the source cell to the UE, and the trigger condition related to the target cell, such as a T304 threshold, is configured by the target cell to the UE. The UE may inform the network side of the successful handover report (as indicated by successHO-InfoAvailable information element) available on it via an RRC message. After receiving the indication, the network side may request the UE to report the saved successful handover information report through an RRC message (e.g., successHO-ReportReq in the UE information request UEInformationRequest message). The UE will Report the saved radio link failure Report (successHO-Report in the UE info response UEInformationResponse message) to the network side in a response RRC message. This procedure is called a UE information (UE information) procedure. The successful handover report stored on the UE may be stored for a maximum of 48 hours.

As described above, the SHR mechanism at PCell handover is standardized in the NR system of release 17 to optimize the robustness of movement in handover scenarios. One of the research targets in release 18 is to introduce a Report (Successful PSCELL CHANGE Report, SPR) of a successful PSCell change under a PSCell change scene, and Report information of a successful PSCell change process to a network side, so that the network side can optimize and adjust parameters of the PSCell change to improve mobility robustness of the PSCell. Successful PSCell change reports, successful PSCell change and addition reports (Successful PSCELL CHANGE & addition report), PSCell reports (Successful PSCell report) may be substituted, all referred to as SPR. In the present disclosure, it is assumed that the reporting process of SPR is similar to SHR, that is, if it is determined that one SPR is to be generated by a UE that successfully performs a PSCell change/addition process, the UE stores the content of the generated SPR in a corresponding UE variable, and indicates to a network side that there is a stored SPR thereon through an RRC message; after receiving the request of the network side for indicating the network side to report the SPR, the UE reports the stored SPR to the network side in an RRC message. Unlike the handover scenario, in the PSCell change scenario, in addition to the participation of the source PSCell and the target PSCell, the MN may also participate in the process. Consider the following scenario: when the source MN1 decides to trigger handover to the target MN2, the MN2 determines that the handover command includes synchronous reconfiguration of the PCell3 and synchronous reconfiguration of the PSCell4, that is, the target base station MN2 determines that the target PCell for handover is PCell3 and needs to change the PSCell to the target PSCell, that is, PSCell4. Such a scenario is called a PSCell change accompanying a handover or a handover accompanying a PSCell change. In this scenario, when the UE receives the RRC reconfiguration message for cell change, it needs to perform PCell change and PSCell change at the same time. In the 3GPP specifications, the order in which the UE performs the random access procedure to the PCell and the random access procedure to the PSCell is not necessarily limited. There is a possibility that the PSCell change of the UE is successful (the random access procedure to PSCell4 is successfully completed), but then the change of the PCell fails (e.g., failure of the random access procedure to the PCell results in T304 timeout). Then it is a matter of concern in this disclosure whether the UE needs to perform a determination procedure of SPR to generate SPR, how to generate SPR, or how the UE generates a radio link failure RLF report corresponding to PCell failure. In addition, in this scenario, there is also a case where PCell handover is possible to succeed, but PSCell change fails or is suspended, and in this case, how to set SHR information becomes a problem of interest in the present disclosure.

The embodiments described below give solutions based on the above problems, and some concepts or definitions may be common among the embodiments unless specifically stated otherwise. The embodiments are also applicable to the case of PSCell addition, that is, the PSCell change may be PSCell addition. Embodiments may also be applicable to conditions reconfiguration cases, such as CHO or CPC.

Example 1

This embodiment presents an information reporting method performed on a UE. With the method of this embodiment, the UE may determine whether to perform the determination procedure of SPR based on whether the PSCell change is accompanied by a change of PCell or is accompanied by a failed PCell change. If the accompanying handover process fails, the UE may not perform the SPR determination process, so as to avoid unnecessary storage and reporting of the SPR, and save energy consumption of the UE and signaling overhead of an air interface.

Hereinafter, embodiment 1 of the present disclosure will be described in detail. Fig. 1 is a schematic flowchart showing an information reporting method in embodiment 1 of the present disclosure, and as shown in fig. 1, the information reporting method in embodiment 1 of the present disclosure may include the following steps.

Step 101: and receiving a signaling containing PCell switching and PSCell changing from a network side, and executing synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell by the UE by applying configuration corresponding to the signaling.

Step 102: when the PSCell changing process is successfully completed, the UE judges whether the PSCell changing process is accompanied with the switching of the PCell of the main cell and whether the switching is failed, if the switching process is failed, the UE does not execute the SPR determining process; otherwise, if the handover procedure is successful, the UE performs a determination procedure of SPR, in which corresponding SPR information is included. Optionally, the SPR information may comprise one or more of:

And first information for indicating whether a PCell change event associated with the SPR is simultaneously performed. Optionally, when the PCell handover is concurrently accompanied/concurrently performed by the PSCell change event, the first information is set to true.

And second information for indicating whether the PCell handover simultaneously performed by the PSCell change event associated with the SPR is successful or failed.

And third information for indicating source PCell information and target PCell information corresponding to PCell handover performed simultaneously with the PSCell change event associated with the SPR. Optionally, the PCell information is a cell identifier corresponding to the PCell. Alternatively, the PCell information further includes measurement results of the PCell, i.e., information for characterizing the PCell downlink signal quality. Optionally, the measurement result is a latest measurement result obtained before the UE performs synchronous reconfiguration of the PSCell when receiving the PSCell change command or a measurement result when a handover failure occurs.

Alternatively, the first information and the second information may be the same information element.

Optionally, the successful completion of a PSCell change procedure refers to that the random access procedure triggered in the PSCell/SCG synchronous reconfiguration procedure is successfully completed, or that a response message, that is, an RRC reconfiguration complete message, for responding to a PSCell change command, that is, an RRC reconfiguration message including SCG synchronous reconfiguration, has been sent.

Alternatively, the determination of SPR is performed, similar to the determination of SHR performed in release 17, referring to whether or not the UE holds the SPR information in the SPR variable and how to set the corresponding SPR information according to the trigger condition parameters in the SPR configuration. For example, the SPR configuration may be a T310 percentage threshold for PSCell, a T312 percentage threshold for PSCell, or a T304 percentage threshold for SCG. For example, when the ratio of the running value of T310 to the configuration value of T310 of the source PSCell before performing synchronous reconfiguration of PSCell exceeds the configured threshold value when the UE receives a PSCell change command, the UE determines to save the SPR information corresponding to the procedure and sets T310-Cause in the corresponding SPR Cause field (SPR-Cause) to true. Alternatively, the UE performs the SPR determination process only when it is configured with the SPR configuration.

Whether the PSCell change process is accompanied by the handover of the PCell of the primary cell at the same time refers to whether the RRC message for triggering PSCell change includes the synchronization reconfiguration for SCG and the synchronization reconfiguration reconfigurationWithSync information element for MCG at the same time. The RRC message for triggering PSCell change includes both the synchronization reconfiguration for SCG and the synchronization reconfiguration reconfigurationWithSync information element for MCG, and it is considered that the RRC message triggers PSCell change and PCell handover at the same time, i.e., the PSCell change procedure is accompanied by PCell handover or PCell handover is accompanied by PSCell change.

Example 2

This embodiment presents another information reporting method performed on the UE. With the method described in this embodiment, the UE may determine to retain the SPR information stored in the SPR variable based on whether the PSCell change is accompanied by a PCell change or is accompanied by a failed PCell change. If the associated handover process fails, the UE may delete the SPR information stored in the SPR variable for the PSCell change, thereby avoiding unnecessary reporting of the SPR and saving energy consumption of the UE and signaling overhead of the air interface.

Hereinafter, embodiment 2 of the present disclosure will be described in detail. Fig. 2 is a schematic flowchart showing the information reporting method in embodiment 2 of the present disclosure, and as shown in fig. 2, the information reporting method in embodiment 2 of the present disclosure may include the following steps.

Step 201: and receiving a signaling containing PCell switching and PSCell changing from a network side, and executing synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell by the UE by applying configuration corresponding to the signaling.

Step 202: and when the PSCell changing process is successfully completed, the UE executes a determining process of SPR, and the SPR variable contains corresponding SPR information. Optionally, the UE performs an SPR determination procedure, and saving the SPR information is performed when the UE determines that the PCell handover procedure saved by the PSCell is ongoing (i.e., the T304 timer for the MCG is running or has not timed out yet).

Step 203: if the UE determines that the PCell handover procedure performed in step 201 fails and the timer T304 for MCG expires, the UE determines that the SPR information in the SPR variable is associated with a PSCell change event accompanying the PCell handover procedure, and deletes the SPR information stored in the SPR variable.

In this embodiment, when the UE performs PCell handover and PSCell change simultaneously, since PSCell change is successfully completed first, the UE triggers recording of SPR information corresponding to the PSCell change event in the SPR variable according to the SPR configuration. However, since the PCell handover failure occurs later, the UE determines that the PSCell change event is a scenario triggered together with the PCell handover, and then deletes the stored SPR information corresponding to the PSCell change event.

Example 3

This embodiment presents yet another information reporting method performed on a UE. By the method described in this embodiment, the UE may determine how to set the SPR information stored in the SPR variable based on whether the PSCell change is accompanied by a failed PCell change. If the associated handover procedure fails, the UE stores information about the current PSCell change in the SPR variable, and also includes information about PCell handover in the SPR, and reports the information to the network side. After receiving the SPR report, the network side can learn that the corresponding PSCell change of the SPR report is successful, but the accompanying/attached PCell handover fails, so as to determine whether to use the SPR report for the corresponding PSCell mobility optimization process and the weight applied to the corresponding PSCell mobility optimization.

Hereinafter, embodiment 3 of the present disclosure will be described in detail. Fig. 3 is a schematic flowchart showing the information reporting method in embodiment 3 of the present disclosure, and as shown in fig. 3, the information reporting method in embodiment 3 of the present disclosure may include the following steps.

Step 301: and receiving a signaling containing PCell switching and PSCell changing from a network side, and executing synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell by the UE by applying configuration corresponding to the signaling.

Step 302: and when the PSCell changing process is successfully completed, the UE executes a determining process of SPR, and the SPR variable contains corresponding SPR information. Optionally, the determining process of the UE performing SPR is performed when the UE determines that the PCell handover accompanied by the PSCell change is also successfully completed; or the determining process of the UE to perform SPR is performed when the UE determines that the PCell handover accompanied by the PSCell change fails.

The inclusion of corresponding SPR information in the SPR variable further includes one or more of the following:

And second information for indicating whether a failure (or successful completion) occurs in the PCell handover simultaneously performed by the PSCell change event associated with the SPR. Optionally, when a failure occurs in the PCell handover concurrently accompanied/concurrently performed by the PSCell change event, the second information is set to true.

Example 4

This embodiment presents yet another information reporting method performed on a UE. By the method described in this embodiment, the UE may determine how to set the SPR information stored in the SPR variable based on whether the PSCell change is accompanied by a failed PCell change. This example is similar to example 3 and is another implementation of example 3.

Hereinafter, embodiment 4 of the present disclosure will be described in detail. Fig. 4 is a schematic flowchart showing the information reporting method in embodiment 4 of the present disclosure, and as shown in fig. 4, the information reporting method in embodiment 4 of the present disclosure may include the following steps.

Step 401: and receiving a signaling containing PCell switching and PSCell changing from a network side, and executing synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell by the UE by applying configuration corresponding to the signaling.

Step 402: and when the PSCell changing process is successfully completed, the UE executes a determining process of SPR, and corresponding SPR information is stored in the SPR variable.

Step 403: the UE determines that the failure of the PCell handover procedure performed in step 401 occurs if the timer T304 for MCG expires, and then the UE determines that the SPR information in the stored SPR variable is associated with a PSCell change event accompanying the PCell handover procedure, and then the UE further includes one or more of the following information in the SPR variable:

And second information for indicating whether or not the PCell handover performed simultaneously with the PSCell change event associated with the SPR has failed. Optionally, when a failure occurs in the PCell handover concurrently accompanied/concurrently performed by the PSCell change event, the second information is set to true.

Example 5

This embodiment presents a PSCell change information report logging method performed on a UE. In a scenario in which the UE performs PSCell change and PCell handover simultaneously, if PSCell change is successful and PCell handover fails, the UE records SPR information related to the PSCell change in the SPR variable.

Hereinafter, embodiment 5 of the present disclosure will be described in detail. Fig. 5 is a schematic flowchart showing the information reporting method in embodiment 5 of the present disclosure, and as shown in fig. 5, the information reporting method in embodiment 5 of the present disclosure may include the following steps.

Step 501: and receiving a signaling containing PCell switching and PSCell changing from a network side, and executing synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell by the UE by applying configuration corresponding to the signaling.

Step 502: when the PSCell change is successfully completed, the UE performs an SPR determination procedure in which, if it is determined that the PCell associated with step 501 fails, corresponding SPR information is stored in the SPR variable. That is, when the PSCell change is successfully completed and the associated PCell handover fails, the UE saves the corresponding SPR information in the SPR variable.

Optionally, the SPR information comprises one or more of:

That is, the PCell handover failure in step 502 becomes a trigger cause for the UE to execute the SPR determination procedure or to save the SPR information corresponding to the PSCell change procedure in the SPR determination procedure. Therefore, optionally, the storing the corresponding SPR information further includes setting an SPR Cause field (e.g. identified as SPR-Cause) in the SPR as a PCell handover failure, that is, indicating that the PCell handover failure occurring simultaneously with the PSCell change procedure is a trigger Cause of the SPR.

Optionally, step 500 is further included before step 501 or step 502, where the UE receives an SPR configuration from the network side, where the configuration information includes a configuration information, where the configuration information indicates whether the UE generates an SPR when a PSCell change is successfully completed and a PCell handover performed simultaneously fails. Optionally, the configuration is configured by the target PSCell, or the target PCell.

Example 6

This embodiment presents a PSCell change information reporting method performed on a UE. By the method in this embodiment, the UE may report the relevant information to the base station in the SPR to provide more accurate PSCell change information to the network side. This embodiment provides a method for reporting the signaling procedure during SPR in the foregoing embodiment by the UE through an RRC procedure.

Fig. 6 is a schematic flowchart showing the information reporting method in embodiment 6 of the present disclosure, and as shown in fig. 6, the information reporting method in embodiment 6 of the present disclosure may include the following steps.

Step 601: the UE receives UEInformationRequest a message from the network side, which carries an indication/request for requesting the UE to report the stored SPR.

Step 602: the UE includes the stored content in the SPR in UEInformationResponse messages and sends UEInformationResponse messages to the network side. The SPR report included in the UEInformationResponse message includes at least the first to third information in the foregoing embodiments.

Optionally, in embodiments 1 to 6 above, the SPR information in the SPR report includes at least one or more of the following: a source PSCell cell identity or associated downlink measurement, a target PSCell cell identity or associated downlink measurement, a SPR cause (i.e., a cause of triggering SPR), a neighbor cell identity or downlink measurement.

Example 7

This embodiment presents a PSCell change information report logging method performed on a UE. In a scenario in which the UE performs PSCell change and PCell handover simultaneously, if PSCell change is successful and PCell handover is also successful, the UE records SPR information related to the PSCell change in the SPR variable.

Step 701: and receiving a signaling containing PCell switching and PSCell changing from a network side, and executing synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell by the UE by applying configuration corresponding to the signaling.

Step 702: when the PSCell change procedure is successful, the UE performs a determination procedure of SPR. In this procedure, the UE determines whether the PCell handover accompanied in step 701 is successfully completed. If yes, namely the accompanied PCell switching is successfully completed, corresponding SPR information is stored in the SPR variable. This step may also be described as if the PSCell change in step 701 is successfully completed and the accompanying PCell handover is also successful, the UE saves the corresponding SPR information in the SPR determination procedure.

Optionally, the SPR information comprises one or more of:

And second information for indicating whether the PCell handover performed simultaneously with the PSCell change event associated with the SPR is successful.

That is, the success of the PCell handover in step 702 becomes a trigger cause for the UE to perform the SPR determination procedure or to save the SPR information corresponding to the PSCell change procedure in the SPR determination procedure. Therefore, optionally, the storing the corresponding SPR information further includes setting an SPR Cause field (e.g. identified as SPR-Cause) in the SPR as PCell handover success, that is, indicating that the PCell handover success concurrent with the PSCell change procedure is a trigger Cause of the SPR.

Optionally, step 701 or step 702 is preceded by step 700, where the UE receives an SPR configuration from the network side, where the configuration information includes a configuration information indicating whether the UE generates an SPR when a PSCell change is successfully completed and a PCell handover performed simultaneously is successful. Optionally, the configuration is configured by the target PSCell, or the target PCell.

Example 8

The embodiment provides a PSCell change information reporting mode realized on UE. In the scenario that the UE performs PCell handover and PSCell change simultaneously, if PSCell change fails or is stopped and PCell handover is successful or PCell handover fails, the UE includes state information of PSCell change in a PCell handover success report SHR or a PCell handover failure report (RLF report). The network side can acquire the PSCell change execution condition accompanied by PCell switching, thereby providing basis for PSCell mobility optimization under the scene.

Step 801: and receiving a signaling containing PCell switching and PSCell changing from a network side, and executing synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell by the UE by applying configuration corresponding to the signaling.

Step 802a: when the PCell handover is successfully completed, the UE performs an SHR determination procedure, saving SHR information in the SHR. The SHR information includes PSCell change related information executed in step 1. The PSCell change related information may be one or more of the following:

The fourth information includes source PSCell information or target PSCell information of PSCell change procedure. The PSCell information includes a cell identity of the PSCell or a measurement result of the PSCell.

Fifth information for indicating a completion status of the PSCell change procedure, such as success of PSCell change, failure of PSCell change, cause of PSCell change failure, cause of PSCell being suspended/stopped, or cause of PSCell being stopped.

Step 802b: when the PCell handover fails, the UE saves PCell handover failure related information in the RLF report variable. The PCell handover failure related information includes PSCell change related information executed in step 801. The PSCell change related information may be one or more of the fourth or fifth information in step 802a described above.

Example 9

This embodiment illustrates the user equipment UE of the present disclosure. Fig. 7 is a block diagram showing a user equipment UE according to the present invention. As shown in fig. 7, the user equipment UE70 comprises a processor 701 and a memory 702. The processor 701 may include, for example, a microprocessor, microcontroller, embedded processor, or the like. The memory 702 may include, for example, volatile memory (such as random access memory RAM), a Hard Disk Drive (HDD), non-volatile memory (such as flash memory), or other memory. The memory 702 has stored thereon program instructions. The instructions, when executed by the processor 701, may perform various methods of the above-described mobile information reporting method and the like described in detail in the present invention.

The method of the present disclosure and the apparatus involved have been described above in connection with the preferred embodiments. Those skilled in the art will appreciate that the methods shown above are merely exemplary. The methods of the present disclosure are not limited to the steps and sequences shown above. The base stations and user equipments shown above may comprise further modules, e.g. may also comprise modules that may be developed or developed in the future that may be used for base stations, MMEs, or UEs, etc. The various identifiers shown above are merely exemplary and are not limiting, and the present disclosure is not limited to specific cells as examples of such identifiers. Many variations and modifications may be made by one of ordinary skill in the art in light of the teachings of the illustrated embodiments.

The program running on the apparatus according to the present disclosure may be a program for causing a computer to realize the functions of the embodiments of the present disclosure by controlling a Central Processing Unit (CPU). The program or information processed by the program may be temporarily stored in a volatile store such as a random access memory RAM, a Hard Disk Drive (HDD), a nonvolatile store such as a flash memory, or other memory system.

A program for realizing the functions of the embodiments of the present disclosure may be recorded on a computer-readable recording medium. The corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs. The term "computer system" as used herein may be a computer system embedded in the device and may include an operating system or hardware (e.g., peripheral devices). The "computer-readable recording medium" may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium in which a program is stored dynamically at a short time, or any other recording medium readable by a computer.

The various features or functional modules of the apparatus used in the embodiments described above may be implemented or performed by circuitry (e.g., single-chip or multi-chip integrated circuits). Circuits designed to perform the functions described herein may include a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The circuit may be a digital circuit or an analog circuit. Where new integrated circuit technologies are presented as an alternative to existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present disclosure may also be implemented using these new integrated circuit technologies.

Further, the present disclosure is not limited to the above-described embodiments. Although various examples of the embodiments have been described, the present disclosure is not limited thereto. Fixed or non-mobile electronic devices installed indoors or outdoors may be used as terminal devices or communication devices such as AV devices, kitchen devices, cleaning devices, air conditioners, office devices, vending machines, and other home appliances, etc.

As above, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. The specific structure is not limited to the above-described embodiments, but the present disclosure also includes any design modifications without departing from the gist of the present disclosure. In addition, various modifications can be made to the present disclosure within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments are also included in the technical scope of the present disclosure. Further, the components having the same effects described in the above embodiments may be replaced with each other.

Claims

1. An information reporting method, comprising:

After a User Equipment (UE) in double connection successfully completes a primary and secondary cell PSCell changing process, the UE judges whether primary cell PCell switching accompanied by the PSCell changing process fails or not;

When it is determined that the primary cell PCell handover associated with the PSCell change procedure fails, the successful PSCell change report SPR includes at least one of the following information:

First information for indicating that a PSCell change event is simultaneously performed with a PCell handover;

second information for indicating that a failure has occurred in a PCell handover simultaneously performed by a PSCell change event;

and third information for indicating a PCell handover corresponding to the source PCell information or the target PCell information, which is simultaneously performed by the PSCell change event.

2. The information reporting method as claimed in claim 1, wherein,

And the UE executes an SPR determination process when the PSCell is successfully changed, wherein SPR information is contained in the SPR.

3. The information reporting method according to claim 1 or 2, wherein,

The successful completion of the PSCell change is the successful completion of the random access procedure to the target PSCell triggered by the PSCell change.

4. The information reporting method as claimed in claim 1, wherein,

The UE performs an SPR determination procedure when a timer T304 for the MCG expires, and SPR information is included in the SPR.

5. The information reporting method as claimed in claim 1, wherein,

When the RRC message for triggering PSCell change includes both a synchronous reconfiguration information element for SCG and a synchronous reconfiguration information element for MCG, the UE determines that the PSCell change procedure is accompanied by the PCell handover.

6. The information reporting method as claimed in claim 1, wherein,

The PCell information includes a cell identifier corresponding to the PCell or a measurement result of the PCell.

7. The information reporting method as claimed in claim 1 to 4, wherein,

And receiving SPR configuration from a network side before the UE executes PSCell change, wherein the SPR configuration comprises configuration parameters for triggering SPR, and the SPR determination process is executed based on the SPR configuration.

8. The information reporting method as claimed in claim 7, wherein,

The configuration information indicates whether the UE generates SPR upon successful completion of PSCell change and failure of the PCell handover performed simultaneously.

9. The information reporting method as claimed in claim 1, wherein,

And when the UE receives a UE information request UEInformationRequest message from the network side, the UEInformationRequest message carries an instruction/request for requesting the UE to report the stored SPR, the UE includes the stored content in the SPR in a UE information response UEInformationResponse message and sends the UE information response UEInformationResponse message to the network side.

10. A user equipment, comprising:

a processor; and

A memory having instructions stored thereon;

Wherein the instructions, when executed by the processor, cause the user equipment to perform the information reporting method according to any one of claims 1-9.